Aunt is menstruation, no menstruation and no breast pain, may be pregnant, may be due to menstrual disorders, dieting. 1. Pregnancy: If you are like in childbearing age, normal sex life, if there is a delay in menstruation, highly suspicious of the possibility of pregnancy, may be due to embryonic dysplasia or embryonic cessation of development will result in breast pain, it is recommended to consult a doctor in a timely manner, to determine whether or not pregnancy. 2. Menstrual disorders: endocrine disorders may induce menstrual disorders, manifested by delayed menstruation, and breasts may not be painful. Diagnosis needs to be confirmed in endocrine examination and ultrasonography. 3. Dieting: If frequent dieting, eating less, deterioration of the nutritional status of the whole body, weight loss, the cerebral cortex will be dysfunctional, affecting the hypothalamus pituitary gonadal axis function, luteinizing hormone secretion is insufficient, the secretion of sex hormones is reduced, there may be amenorrhea manifested in the absence of a period of chest pain. If there is no menstruation and no chest pain, it is recommended to consult a doctor in time to clarify the cause and follow the doctor’s instructions for symptomatic intervention.